Setting Up Samsung S2-tethering & POP email

I have recentlypurchased a samsung s2 and wish to set it up for tethering to act as a 3g 'modem' on a windows xp pc. Will you kindly explain what I need to enable on the PC and the settings I need to use to access the internet?

I also wish to access a pop email account, how do I do this and what settings do I use?